Cell phone rang twice then stopped. Area code was 268 and location ID'd as Antigua/Barbuda. A quick Google search came up with this. Although I never return missed calls unless a voice mail is left, just thought I'd post what I found.
Why you might not want to call back that number - FOX 13 News (http://www.myfoxtampabay.com/story/24597559/2014/01/31/officials-warn-of-missed-calls-scam)

I never answer calls from a number that I don't recognize and I certainly never try to call them back. I've heard of those kind of scams for many years. If someone is calling me from a number I don't know they can leave a message and then I'll decide if I want to call them back.

You did the right thing. I won't return any call without a message unless it's
from my contact list.

I'm glad that Fox has the sense to make these messages public.